A letterhead typically includes a company's logo, name, address and contact information printed at the top of letter paper or stationary. Letterheads can be used for business correspondence like invoices, meeting minutes, legal announcements and inter-departmental memos. Letterheads serve several important roles in business letters: they introduce the company, act as a legal representation, convey professionalism, help promote the company as a sales tool, persuade customers through first impressions, and serve as a marketing tool by providing contact information.